| 摘要 |
A method of manufacturing a thin ribbon of magnetic material having a high permeability and excellent flexibility and workability comprising the combination of steps of melting a magnetic material consisting of essentially of by weight 4-7% of aluminum, 8-11% of silicon and the remainder substantially iron and inevitable impurities at a temperature of between a melting point and a temperature not exceeding 300 DEG C. from the melting point, and necessary subingredient of less than 7%, ejecting thus obtained melt under a pressure of 0.01-1.5 atm. through a nozzle onto a moving or rotating cooling substrate, cooling super-rapidly the melt on the rotating surface of said cooling substrate at a cooling rate of 103 -106 DEG C./sec so as to have a high initial permeability of more than 104, a low coercive force of less than 0.10 Oe and an excellent flexibility, forming a thin ribbon having a compact and fine grain size structure substantially without existing of the ordered lattice, and annealing thus obtained thin ribbon at a temperature of between 600 DEG to 1,000 DEG C. for 1 minute to 5 hours, more preferably 1 to 100 minutes so as to obtain a columnar crystal structure by promoting the growth of crystal grain size.
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